Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Pressure Cycling Switch


A/C PRESSURE CYCLING SWITCH

The A/C pressure cycling switch is closed when there is sufficient refrigerant charge. When the A/C control switch is turned "ON" and the pressure cycling switch is closed, a request signal is sent to the ECM, which energizes the A/C control relay. When the ECM senses this signal it will also turn "ON" the cooling fan.